Apparatus for making hollow bricks which are closed on all sides.



Patented July '7, 1914,

2 SHEETS-SHEET 1.

J. WO'LPL. APPARATUS FOR MAKING HOLLOW BRICKS WHIGH ARE CLOSED ON ALL SIDES.

APPLICATION FILED NOV. 29, 1913.

THE NORRIS PETERS (70., PHOTO-LITHQ, WASHINGTON. v. C.

J. Wb'LPL. APPARATUS FOR MAKING HOLLOW BRICKS WHICH ARE CLOSED ON ALL SIDES. APPLIOATION FILED NOV. 29, 1913.

1,102,841 V Patented July 7, 1914.

2 SHEETSSHEBT 2.

THE NORRIS PETERS c0, PHO TO-LITHO. WASHINGTON. D. G.

UNITED STAES PATENT OFFICE.

JOSEPH. worn, or ninnnsnnnvr, GERMANY.

APPARATUS FOR MAKING HOLLOW BRICKS WHICH ARE CLOSED ON ALL SIDES.

Specification of Letters Patent.

Patented July 7, 1914.

Application filed November 29, 1913. Serial N 0. 803,644.

To all whom it may, concern:

Be it known that I, JOSEPH WoLrL, tile master, a citizen of the Empire of Germany, residing at Drispenstedterstrasse No. 23, Hildesheim, in the Empire of Germany, have invented a new and useful Apparatus for Making Hollow Bricks lVhich Are Closed on All Sides, of which the following is a specification.

My invention relates to apparatus for making hollow bricks which are closed on all sides. To make such bricks, there have already been proposed one method by which the stream of clay is closed on the shearing table by means of a cutting tool or blade operating like a wedge or like a plowshare, and another method by which, by means of a hinged or pivoted plate the mass for making the closure is while within the mouthpiece withdrawn from the integral stream of material located behind the core and is brought to the place of closure. The stream of clay cannot however be cut smoothly by means of a cutting tool of the kind described, because when the wedge-like or plowsharelike blade is pressed into the clay, the said stream of clay spreads in all directions. In the other known method of closing up the hollow stream by means of a hinged or pivoted plate located within the mouth of the press, the shaft or eccentric shaft breaks into the stream of clay when pressure is applied, so that when the said stream is again closed, the fine particles of the clay are not so perfectly closed and int-ercalated that cracks are avoided'in the subsequent drying and baking of the bricks. The result of such cracks is that the strength and durability of the hollow bricks are much impaired.

A primary object of my invention is to obviate these defects, in other words, neither to press apart the stream of clay when closing the hollow bricks nor, when pressing, to out or break up the said stream in the mouth piece by means of the eccentric shaft and slide or slide-rods and the like.

Moreover a further object is to provide a device whereby any hollow brick, either thin or thick walled or of any form whatever can without exception be closed or pressed toether.

A still further object is to employ hinged or pivoted members which are adapted in a simple manner to the openings, a condition which is not readily possible in the lmown devices. Moreover, compared with the last described known device, my device is advantageous in that each mouthpiece of the hollow brick can be utilized without modifying the production of the hollow stream.

To these ends, according to my invention, the hollow brick is closed by means of a device operating in known manner simultaneously as a cutting tool. To close the brick two interconnected racks and through these eight pivoted members are actuated by means of a hand-lever, which if desired can also be operated mechanically, these members first very quickly penetrating the stream of clay which rests on the shearing table and closing by pressure the openings in the hollow brick which it is desired to form, and finally snapping back to their original positions. Thereupon the closed ends of the bricks are out off flush by means of a cutting bow carrying two wires, whereupon, when the carriage is drawn forward the remaining pieces of clay fall to the floor.

One illustrative embodiment of my invention is represented by way of example in the accompanying drawing, wherein Figure 1 is a side elevation of the apparatus, partly in longitudinal section, and Fig. 2 is an end elevation, also partly in section.

Referring to the drawing, a hand-lever a, fast on an axle Z), serves by means of the lever (Z to press downwardly the two racks c and 0 The racks c, c, drive the two gears c, e, and thus rotate the axles f, f, respectively. On these axles are fastened the four upper pivoted plates g, g g and 9 At the same time two lower axles 71, 2', are r0- tated by the upper axles f, f, by means of the crossed belts it, il and the four lower pivoted plates 70, 7a,, 76 70,, fast on the said lower axles, are also rotated. In order that the racks and therefore the said plates may be automatically and quickly returned after the brick has been closed, the racks are subjected to the action of helical springs Z, Z which automatically return these racks and plates to their initial positions when the pressure stroke given by the hand-lever a is completed. The cutting wires which are fastened in known manner to a cutting how are designated by the symbols m, m, and the traveling carriage by the symbol a.

. The device can of course be so constructed that only one brick is made each time or that the brick or bricks is or are closed only by means of the upper pivoted plates or only by means of the lower pivoted plates. The said device can moreover be adapted in the simplest way to allpossible kinds of hollow bricks.

Instead of the hand-lever there may be provided if desired a mechanical drive and instead of the rack mechanism any desired mechanism comprising toothed wheels or the like may be employed.

I claim 1. In presses for making closed hollow bricks from a hollow stream of clay, the combination with a shearingtable for the clay comprising a front brick-receiving portion,

. of two shearing pressure members j ournaled immediately at the rear of said portion and adapted to move oppositely to each other in the path of said stream but normally positioned out of said path, and means for rotating said members into said path.

2. In presses for making closed hollow bricks from a hollow stream of clay, the combination with a shearing table for the clay .comprising a front brick-receiving portion, of two sets of shearing pressure members journaled immediately at the rear of said portion, the members of each set being adapted to move in the path of said stream oppositely to the members of the other set but all the members being normally positioned out'of said path, and means for rotating said members into said path.

8. In presses for making closed hollow bricks from a hollow stream of clay, the combination with a shearing table for the clay comprising a front brickreceiving portion, of two shearing pressure members journaled immediately at the rear of said portion and adapted to move oppositely to each other in the path of said stream but normally positioned out of said path, and means comprising toothed gearing for rotating said members into said path.

4:. In presses for making closed hollow bricks from a hollow stream of clay, the combination with a shearing table for the clay comprising a front brick-receiving portion, of two shearing pressure members journaled immediately at the rear of said portion and adapted to move oppositely to each other in the path of said stream but normally positioned out of said path, and

manually operated means for rotating said members into said path.

5. In presses for making closed hollow bricks from a hollow stream of clay, the combination with a shearing table for the clay comprising a front brickreceiving portion, of two pairs of shearing pressure vmembers journaled immediately at the rear of said portion, each pair consisting of a member mounted above and a member mounted below the path of said stream, the members of each pair being adapted to move in the path of said stream oppositely to the members of the other pair but all the members being normally positioned out of said path, and means comprising two interconnected racks, each geared to a pair of members, for-rotating said members into said path. 7

6. In presses for making closed hollow bricks from a hollow stream of clay, the combination with a shearing table for the clay comprising a front brick-receiving portion, of two shearing pressuremembers journaled immediately at the rear of said portion and adapted to move oppositely to each other in the path of said stream but normally positioned out of said path and means for rotating said members into said path; and means for quickly returning said members to their normal positions.

7. In presses for making closed hollow bricks from a hollow stream of clay, the combination with a shearing table for the clay comprising a front brickreceiving portion, of two pairs of pressure shearing members journaled immediately at the rear of said portion, each pair consisting of a member mounted above and a member mounted below the path of said stream, the members of each pair being adapted to move in the path of said stream oppositely to the members of the other pair but all the members being normally positioned out of said path, and means comprising two interconnected racks, each geared to a pair of members, for rotating said members into said path; and means comprising springs bearing on said racks for quickly returning said members to their normal positions.

JOSEPH WOLFL. Witnesses T. HENDLY REED, Hemmer; SCHUMACKER.

copiel of this patent may be obtained for five cents each, -by addressing the f Commissioner of Patents. Washington, D. 0. 

